Downhole closed-loop anti-tilting tool

A downhole closed-loop anti-tilting tool, comprising:

• a housing, with two ends that can be connected with a drill stem and a drill bit respectively;
• a rotating impeller that is arranged in the housing and can be driven by the drilling fluid to rotate;
• a hydraulic pump that is arranged in the housing and connected in transmission to the rotating impeller;
• recessed parts circumferentially arranged at intervals on an outer circumference of the housing;
• a plunger movably arranged in the recessed parts and a push plate arranged on an outer surface of the plunger;
• a plurality of hydraulic flow paths circumferentially arranged at intervals in the housing, the plurality of hydraulic flow paths respectively communicating the hydraulic pump and each recessed part;
• and an eccentric flow dividing disc disposed on the plurality of hydraulic flow paths, an outer circumference of the eccentric flow dividing disc being provided with a notch allowing one of the hydraulic flow paths to be communicated, the center of gravity and the notch of the eccentric flow dividing disc being respectively located on two sides of a central axis of the eccentric flow dividing disc, and the eccentric flow dividing disc being capable of rotating around the central axis;
• wherein when the housing is inclined, the eccentric flow dividing disc rotates to a state in which the notch is located at a higher position and the center of gravity is located at a lower position, so as to connect to one of the hydraulic flow paths and disconnect the other hydraulic flow paths, so that the plunger and the push plate corresponding to the connected hydraulic flow path are driven to move outward radially.